Snapping roll with rubber inserts



Feb. 24, 1953 E. K. KARLSSON 2,629,384

SNAPFING ROLL WITH RUBBER INSERTS Original Filed Sept. 50, 1948 kINVENTOR ELOF KKARLSSON ATT'Y Patented Feb. 24, 1953 SNAPPING ROLL WITHRUBBER INSERTS 'Elof K. Karlsson, Moline, Ill., assignor toInternational Harvester Company, a corporation of New Jersey Originalapplication September 30, 1948, Serial No. 52,112, now Patent No.2,569,175, dated September 25, 1951. Divided and this applicationDecember 29, 1949, Serial No. 135,571

2 Claims. 1

This invention relates to a new improved ribbed corn snapping roll witha plurality of rubber inserts thereon and is a division of my copendingapplication Serial No. 52,112 now Patent No. 2,569,175.

Cooperative corn snapping rolls must perform the function of moving acorn stalk rearwardly therebetween and must simultaneously be equippedto pull the stalk downwardly. This last action must be aggressive inorder to effectively pull the stalk down between the cooperativesnapping rolls to the point where the ear is attached to the stalk. Manyforms of aggressive means have been employed to cause this downwardmovement of the stalk, but there have been few if any rolls which areaggressive enough to engage and force the stalk downwardly withoutcrushing the stalk and thus breaking it off or causing considerableshelling of corn when the ear is snapped. Certain of these prior cornsnapping rolls employed a combination of materials such as wood andrubber or the like, but none of them operated too successfully for anylength of time.

It is a principal object of this invention to provide a corn snappingroll which will snap ears of corn without breaking of the stalk orshelling of corn, and one which will have a long wearing life.

An important object of this invention is' to provide a corn snappingroll having an integral spiral rib and a plurality of rubber inserts.

Another important object of this invention is the provision of means ina ribbed corn snapping roll for positioning a plurality of rubber padsbetween adjacent convolutions of the spiral rib.

Another and still further important object of this invention is toprovide a spiral ribbed snapping roll with a plurality of yieldable padslocked in predetermined position between adjacent convolutions of thespiral rib and means substantially shielding the yieldable pads fromabrasive action along the edges thereof.

A still further important object of this invention is the provision of aspiral ribbed snapping roll having a plurality of circularly shapedrubber pads depressed in a concave manner between adjacent convolutionsof the spiral rib for the purpose of increasing aggressive action of thesnapping rolls Without harmful effects on the corn being snapped.

Other and further important objects of this invention will becomeapparent from the disclosures in the following specification andaccompanying drawings in which:

2 Fig. 1 is a top plan View of a portion of the snapping roll of thisinvention.

Fig. 2 is a top plan view of one of the flexible rubber disc padsemployed in the snapping roll of Fig. 1.

Fig. 3 is a sectional view taken on the line 3 -3 of Fig. 1.

Fig. 4 is a sectiohalview similar to Fig. 3 in which the rubber disc padof Fig. 2 is shown being applied to the snapping roll.

Fig. 5 is a sectional view taken on the line 55 of Fig. 1.

As shown in the drawings:

The reference numeral 25 indicates generally an elongated snapping roll.In operation, a snapping roll such as shown at 25 is arranged adjacent asimilar snapping roll and the two rolls cooperate with each other topull corn stalks downwardly therebetween with a resulting snapping ofthe ears of corn from the stalks as they reach the juncture of thecooperative snapping rolls. The roll 25 has a cylindrical core 26 and isprovided with an integral spirally wound rib 21 extending the lengththereof. The spiral rib is employed for the purpose of moving the cornstalks toward the rear of the rolls. The means for causing the stalks tomove downwardly in the present case is in the form of rubber pad members28 preferably disposed in longitudinal alignment and being alternatelyspaced between adjacent convolutions of the spiral rib 21. It should, ofcourse, be understood that any positioning of the rubber pads iscontemplated by this invention. In normal use, it is believed that therubber pads will be sumciently aggressive to move corn stalks downwardlyif they are placed in the longitudinal alignment as shown in Fig. 1 andhave two such rows of pads in diametrically opposed position on the roll25. In the driving of corn snapping rolls inwardly toward each other, itwill be desirable to so time the cooperative roll that its rubber padscontact an adjacent roll in spaced relationship with the rubber pads ofthat adjacent roll.

As best shown in Fig. 2 the rubber pad 28 employed on the roll 25 iscircular in shape and has an aperture 29 in the center thereof. The padis applied to the roll 25 in the manner shown in Fig. 4. A bolt member30 threadedly engages an aperture 3| in the roll core 26. The rubberdisk 28 is placed down over the bolt 30 with the aperture 29 in the disksnugly engaging the outer periphery of the bolt. A screw driver or othertool 32 is provided for screwing the bolt 30 into roll engagingposition. As the flexible disk 28 is buckled in the concave fashionshown in Fig. 3 the tool 32 is used to bend the split upper portions 33and 34 of the bolt 30 down over portions of the disk 28 adjacent thehole 29, thus holding the disk to the snapping roll. In Fig. 3 adjacentconvolutions 35 and 36 of the spiral rib 21 are shown as the confiningmeans for the collapsed rubber pad 28. After forming the rubber pad intothe concave position shown it has upwardly extending side walls 31 and38 which lie substantially parallel to and against the rib convolutions35 and 36 respectively.

It will thus be apparent that in operation there is provided anaggresive snapping roll which is not injurious to the ear of corn duringsnapping by reason of the flexible rubber pads and which willeffectively cause the stalk to be pulled downwardly between two suchrolls without fear of breaking the corn stalk. Further, the concaveshape of the pad and the nestling of the pad between adjacent ribconvolutions prevent interference with the rearward movement of thestalk by the spiral rib of the roll.

I am aware that various details of construction may be varied throughouta wide range without departing from the principles disclosed herein andI therefore do not propose limiting the patent granted hereon otherwisethan as necessitated by the appended claims.

What is claimed is:

1. In a corn snapping roll comprising a substantially cylindrical core,a spiral rib extending around and over substantially the entire lengthof the core and forming an integral part thereof pads of yieldablematerial positioned on the roll equidistant between adjacentconvolutions of the spiral rib, and means for holding the pads to theroll at their centers, said pads being circular and of greater diameterthan the spacing between adjacent spiral rib convolutions.

2. A device as set forth in claim 1 in which the means for holding thepad to the roll comprises an elongated split head bolt engaging the rollcore and having the wings of its split head bent outwardly over thesurface of the circular pad to hold the pad to the core.

ELOF K. KARLSSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,859,800 Schwartz May 24, 19322,178,013 Blank Oct. 31, 1939 2,315,950 Fitzloff Apr. 6, 1943

